A, B = gets.split.map(&:to_i)

gcd = A.gcd(B)

ng = 0
ok = 10 ** 18

while (ok - ng).abs > 1
  c = (ok + ng) / 2

  if gcd <= c ** 2
    ok = c
  else
    ng = c
  end
end

if ok ** 2 == gcd
  puts 'Odd'
else
  puts 'Even'
end